Sea spray was blown upon the rocks of Holy Guard, the grey sky raved, the trees rocked and moaned upon the hills. Rain whirled with the wind. The towers and walls shook; doors chattered; gallery and court were full of the storm.

At midnight there came the cry of a trumpet from the troubled darkness of the night. Armed men were climbing the causeway with rain beating upon their faces, moisture clinging to their beards. There came the rattle of a spear staff on the great gate of the abbey, and again the trumpet challenged the dark walls, like the cry of a sea-bird driven by the storm.

Twelve nuns and novices were in the chapel keeping a vigil with the Abbess Joan. For the rest, Holy Guard and all its sisterhood were plunged in darkness and in sleep. The porteress at the gate, nodding over her prayers in the guard cell, started at the trumpet cry, drew her gown round her, crept shivering to the grille.

“Who knocks?” she cried.

“Open in God’s name!”

The woman drew back the bolts, opened the wicket, peered out into the gloom. Men, rain-drenched and cloaked, scrambled in, black shadows pouring out of the night. Two soldiers seized on the porteress. A wet, hairy hand was over her mouth, stifling her cries; she was huddled into her cell, where a lamp flared with the draught through the gate.

Armed men still poured in, a tide that swirled from wall to wall. Rough voices rose amid the racket of the storm.

“Lights there; fire the torches.”

“Keep together.”

“The chapel, sirs. Follow me. Ten of you hold the gate.”